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[Q] How to change permission in system file Android

OP elefher

5th September 2014, 07:03 PM   |  #1  
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Hi to everyone,
I try to make a cpu control app for android devices.
I have stuck and i want to ask you how can i change the clock frequency with java.
I think that i have to change the frequency in this file /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq in order to change the max frequency. So i want to ask you how can i change the file permission?
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